Table 9.4. Stability assessment of breakwaters.
Wave period, T
Wave height, H
Water depth
Loading
Movement of armour blocks
Remarks
Prototype
(sec)
Model
(sec)
Prototype
(m)
Model
(m)
Prototype
(m)
Model
(m)
Category
No. of
units
% of
damage
9
1.81
5
0.202
10.2
0.41
Normal
P
Q
R
S
1
0
0
1
0.125
One armour unit was rocking
9
1.81
5.4
0.218
11.2
0.45
Design
P
Q
R
S
1
0
0
0
0.125
One armour unit was rocking;
Splashing of water drops
towards harbour side
9
1.81
3.7
0.150
10.2
0.41
Shakedown
P
Q
R
S
1
0
0
0
0.125
One armour unit was rocking
9
1.81
6.8
0.275
11.2
0.45
Overload 1
P
Q
R
S
4
0
0
0
0.50
Four armour unit were rocking;
overtopping was measured by
traybox (725 ml)
9
1.81
6.8
0.275
10.2
0.41
Overload 2
P
Q
R
S
1
0
0
0
0.125
One armour unit was rocking
9. Physical Modeling
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